Main Menu - Special Functions - Group - Danfoss VLT HVAC Basic Drive FC 101 Programming Manual

Parameters

3.10 Main Menu - Special Functions - Group

14
3.10.1 14-0* Inverter Switching
14-01 Switching Frequency
Option: Function:
Select the inverter switching frequency. Changing
the switching frequency can help to reduce
acoustic noise from the motor.
NOTICE
The output frequency value of the
frequency converter must never exceed
1/10 of the switching frequency. When the
motor is running, adjust the switching
frequency in 14-01 Switching Frequency
until the motor is as noiseless as possible.
NOTICE
High switching frequencies heat the
frequency converter and may reduce its
lifetime.
NOTICE
Not all choices are available
in all power sizes.
[0] Ran3 3 kHz true random PWM (White noise modulation)
[1] Ran5 5 kHz true random PWM (white noise modulation)
[2] 2.0 kHz
[3] 3.0 kHz
[4] 4.0 kHz
[5] 5.0 kHz
[6] 6.0 kHz
[7] 8.0 kHz
[8] 10.0 kHz
[9] 12.0kHz
[10] 16.0kHz
14-03 Overmodulation
Option: Function:
[0] Off Selects no overmodulation of the output voltage to
avoid torque ripple on the motor shaft.
[1] On The overmodulation function generates an extra
*
voltage of up-to 8% of U
overmodulation, which results in an extra torque of
10-12% in the middle of the over-syncronous range
(from 0% at nominal speed rising to approximately
12% at double nominal speed).
®
VLT HVAC Basic Drive FC 101 Programming Guide
output voltage without
max
MG18B302 - Rev. 2013-09-02
14-08 Damping Gain Factor
Range: Function:
96 % [0 - 100 %] Damping factor for DC-Link Voltage
*
Compensation.
3.10.2 14-1* Mains On/Off
Parameters for configuring mains failure monitoring and
handling.
14-10 Mains Failure
Option:
[0] No function
*
[1] Ctrl. ramp-down
[3] Coasting
[4] Kinetic back-up
[6] Alarm
14-12 Function at Mains Imbalance
Option: Function:
Operation under severe mains imbalance
conditions reduces the lifetime of the motor.
Conditions are considered severe if the motor is
operated continuously near nominal load (e.g. a
pump or fan running near full speed).
When a severe mains imbalance is detected:
[0] Trip Trips the frequency converter.
*
[1] Warning Issues a warning.
[2] Disabled No action.
CAUTION
May cause reduced life time.
3.10.3 14-2* Trip Reset
14-20 Reset Mode
Option: Function:
NOTICE
Automatic reset is also active
for resetting safe stop function.
Select the reset function after
tripping. Once reset, the frequency
converter can be restarted.
[0] Manual reset Select [0] Manual reset, to perform a
*
reset via [Reset] or via the digital
inputs.
[1] Automatic reset x 1 Select [1]-[12] Automatic reset x 1...
x20 to perform between 1 and 20
automatic resets after tripping.
[2] Automatic reset x 2
3
Function:
65
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